BICEP and Keck Array - Wikipedia, the free encyclopedia:
"BICEP and the Keck Array are a series of cosmic microwave background (CMB) experiments. They aim to measure the polarisation of the CMB; in particular, measuring the B-mode of the CMB. The experiments have had three generations of instrumentation, consisting of BICEP1, BICEP2 and the Keck Array, with BICEP3 currently being constructed. On 17 March 2014 the collaboration announced the detection of B-modes at the level of r=0.2."
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